NPC_SUBBANK_FLAG_USED
sb->flags = NPC_SUBBANK_FLAG_USED;
WARN_ONCE(!(sb->flags & NPC_SUBBANK_FLAG_USED),
if (sb->flags & NPC_SUBBANK_FLAG_USED)
if (sb->flags & NPC_SUBBANK_FLAG_USED) {
if (sb->flags & NPC_SUBBANK_FLAG_USED)